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Interplanetary travel is not undertaken in a straight line. Instead, rockets follow a trajectory which loops past the moon or planets along the way to get a slingshot boost through the gravitational field of the object.
However, assuming you travelled in a straight line from the Earth to Neptune and the journey were planned so that the orbits of the Earth at launch and that of Neptune at arrival were in a straight line (Earth's aphelion and Neptune's perihelion), it would take approx 3.9 years.
What else can I help you with?
How long did it take to get to Neptune?
It took twelve years to get from earth to neptune.
How long does it take Triton to revolve around Neptune?
it take Triton about 6 days to orbit Neptune
How long does it take Neptune to make or complete a rotation?
60,190 days164.79 years89,666 Neptune solar days
How long does it take Neptune to revolve the sun one time?
It takes Neptune 165 years to take a full rotatation around the sun.
How long does it take from earth to Neptune?
32 days by car
How long does it take for Neptune and Pluto to switch orbits?
288 years
How long does it take neptune rotate around the sun?
about 164 years
How long does it take neptune to rotatoes?
it takes 16.1 days to rotate
How long does Neptune take to rotate (in relationship to Earth)?
16.11 hours.
How long doe it take for neptune to orbit on its axis?
16.11 hours.
How long would it take to travel around neptune?
12 hours
How long does it take for Neptune to make one trip around the moon?
I am sorry to say but neptune orbits the sun not the moon.
